GT-40 Performance Upgrades Help

Does anyone know of a computer chip/injectors maybe combo package to add more power to 99 sport nautique 351 gt40? Thanks in advance!

Thanks for input

Hollywood wrote: Thought I saw around $100 that boosted like 50 hp.

$100? Would that be the "Reid" method of HP boosting with different HP decals on the engine?

Thank you lewy looking more for bolt on mods or chip maybe and where I would get one?

Any clue where?

CI Restorations wrote: Does anyone know of a computer chip/injectors maybe combo package to add more power to 99 sport nautique 351 gt40? Thanks in advance!

Hey Mike,
Probably the easiest way to add a kick to any boat is not even talked about by most of the guys on this site. I buy these by the crate and just use them when the guys want to get a big barefoot line together:

Performance Increase

I dont want to lose injection so I guess Ill be waiting for the stroker

http://www.magnumtuning.com/en/detail/smart-tune-x-boat-fuel-tuner-performance-module     Anyone???

I replyed may have came through as a comment but yes the boat is mine.

CI Restorations wrote: http://www.magnumtuning.com/en/detail/smart-tune-x-boat-fuel-tuner-performance-module     Anyone???

I question any company who would use scotch loc's in a marine environment .........

[QUOTE=lewy2001] Mike I put together a Megasquirt ECM conversion for the GT40. I was planning on upgrading engine with a stroker crank at some stage. My original Ford EEC1V computer was also having intermittent heat soak problems. The injectors are large enough PCM used 24lb injectors most automotive applications of the 351W used 17lb injectors. The injectors would handle almost all the mods you could throw at a 351 cu. in. but maybe marginal if going to a stroker like the 408 cu. in.

The Megasquirt ECM has increased the HP by a small margin .The standard fuel and ignition tables on the GT40 are fairly conservative and would handle mild performance modifications. Paul (Gun-Driver) added the better flowing GT40P heads to his GT40 with no problems.


Lewy, curious about your experience tuning the Megasquirt for your GT40. Did you tune it yourself? If so can you touch on the equipment and sensors (any wideband O2 used somehow in the exhaust) you used to tune it?

You mentioned the stock GT40 tuning tables being mild. How did you get a look at them and anyway you can share those tables?

Thanks

Tom

Cool. Where about in the exhaust system did you install the wideband O2? Do you have a pic of the install?

lewy2001 wrote: I ran the engine with the standard PCM ECU while using the Megasquirt logging feature with a wideband O2 sensor. I also logged the timing while running the standard PCM ECU. The wideband O2 sensor is stilling surviving in the wet exhaust environment after two seasons of use. I do not use the O2 sensor in closed loop mode it is just there for manual tuning purposes. The Megasquirt ECM is run just like the original PCM ECM in open loop mode.

Good work Mark    on a carb biased forum

Guys the Scotchlock jell filled 314's and alike have worked well for me

uk1979 wrote: Guys the Scotchlock jell filled 314's and alike have worked well for me

Roger,
I agree but the 314's are not what comes in the kit!
Also, I value the guy who got his package after 100 years working on wires!!

Gary S wrote: CI Restorations wrote: http://www.magnumtuning.com/en/detail/smart-tune-x-boat-fuel-tuner-performance-module     Anyone??? I question any company who would use scotch loc's in a marine environment .........

Yad nabbit always happens when I come here to CCF for answers.... my questions lost in a sea of ensuing discussion about wire terminals and pumpkin seeds....